50 Unicorn coloring book pages for kids 4-8 [Experienced, fast, reliable and cheap freelancer]

I am Matteo Crismi, a self-published author for children.
I wrote a story about unicorn for kids and I need some coloring pages to include in it.
In particular, I need 50 images of cute unicorns (in different settings, and with different levels of difficulty) for a book for kids 4-8 format 8x11 inches to be published on KDP Amazon.

I have many books of this kind coming up, so I'm looking for a reliable freelancer I can hire on a monthly bases for ALL my future projects.
Initially, I will offer 1$ per image (considering it a trial). Then, if satisfied with the final work, I will be happy to hire you for the long term for many projects and we can negotiate the offer.

Do answer to this offer if:
- you are willing to work on many coloring and activities books for kids;
- you are experienced designers and familiar with margins, layout and stuff;
- you are willing to work, for the very first project/trial, at 1$ per image.

Do not answer to this offer if:
- not experienced designers;
- not willing to accept the abovementioned conditions;
- not familiar with margins, formats and layout for a book to be published on amazon kdp.

I will also give instructions on how the images need to be designed. :)